xsitk_opening_by_recon — 2D extra op

• Data kinds: image → image

• Call: fullseye.apply(img, "xsitk_opening_by_recon", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])

Usage

Opening by reconstruction (SimpleITK `OpeningByReconstruction`). Unlike ordinary grayscale opening (erosion followed by dilation), the dilation after erosion is performed as masked reconstruction, so only small bright protrusions are removed without distorting the contours of the remaining regions.

> The detailed description below is the original text — the summary and the headings are translated.

`a は構造要素の半径(1+int(a*4) で両軸とも 1〜5)を振る。b` は未使用。出力は [0,1] にクリップ。

Detailed usage guide

• gallery2d_color_artistic family guide

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• gallery2d_color_artistic — py -3.11 examples/gallery2d_color_artistic.py

Ops the type connects to (they accept image as input)

identity · gaussian · mean_box · bilateral · unsharp · median · min_filter · max_filter

Same category (extra)

xsitk_curvature_flow · xsitk_minmax_curv_flow · xsitk_curv_aniso_diff · xsitk_laplacian_sharpen · xsitk_grayscale_fillhole · xsitk_grayscale_grindpeak · xsitk_closing_by_recon · xsitk_signed_maurer_dist

*Provenance: ops.py — 2D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.